Chapter 16 Vocab
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Created by:
gkennedy1994 on February 22, 2010
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Phylum Mollusca
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14 terms
Terms | Definitions |
|---|---|
 Adductor Muscle | a muscle that draws the two halves of a bivalve's shell together |
| Crystalline Style | Class Bivalvia; gelatinous rod that projects into the stomach; the rotating of the style frees digestive enzymes and rolls the food mass |
| Excurrent Siphon | Class Bivalvia; filters water out |
| Foot | ventral, solelike structure in which waves of muscular contraction function to create locomotion |
| Hectocotylus | Class Cephalopoda; an arm of adult males used to pluck a spermatophore from his own mantle cavity and insert into a female's mantle cavity (near the oviduct opening) |
| Incurrent Siphon | Class Bivalvia: filters water in |
| Mantle | two folds of skin, outgrowths of the dorsal body wall; outer surface secretes shell |
| Mantle Cavity | space between mantle and bodywall |
| Radula | rasping, protrusible, tonguelike organ; ribbon-like membrane on which are rows of tiny backward teeth; function: to rasp off fine particles of food material from hard surfaces and to carry particles to digestive tract |
| Sepia | a dark fluid containing the pigment melanin that Class Cephalopoda secretes when it is alarmed; often confuses predators |
| Siphon | Class Cephalopoda; the mantle cavity forcefully pushes water through this "funnel" and creates a sort of jet propulsion; controls direction depending in what direction it is pointing |
| Siphuncle | Class Cephalopoda; a cord of living tissue connecting the gas chambers; extends from the visceral mass |
| Umbo | one of the prominences on either side of the hinge region in a bivalve mollusc shell |
| Visceral Mass | contains digestive, circulatory, respiratory, and reproductive organs; depends on ciliary tracks to function |
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